Paulina Listewnik

In this paper, we present the design and the principle of operation of the severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) specific immunoglobulin G (IgG) biophotonic sensor, which is based on the single‐mode telecommunication fiber. We fabricated the sensor head at the face of the single mode fiber‐28. Due to the process of bio‐functionalization, our sensor has the ability to selectively detect the SARS‐CoV‐2 specific IgG antibodies. The results of preliminary tests allowed us to correctly determine the presence of antibodies in less than 1 min in 5 μl in a volume sample of concentration of 10 μg/ml, which according to studies, corresponds to the concentration of IgG antibodies in human serum. Additionally, the tested sample can be smaller than 5 μl in volume.